<%--
  Created by IntelliJ IDEA.
  User: 黑白客
  Date: 2019/6/2
  Time: 19:07
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Title</title>
</head>
<body>
<%-- 获得表单的参数  --%>
<%
    request.getParameter("username");
    //....
%>
<h1>哈哈</h1>
<%--使用el获得参数--%>
${param.username }
${header.["User-agent"]}
${initParam.aaa}
${cookie.name.value}
</body>
</html>
